Process of forming connecting collars for radiators and feed doors



R. w. KRUSE. v PROCESS OF FORMING CONNECTING COLLIIRS FOR RADIATORS AND FEED DOORS.

APPLICATION FILED AUG. I6. I919- 1,438,767.

Patented Dec. 12. 1922.

INVENTOR. aaeer n Ker/Is:

A TTORNEY-S Patented Dec. 12, 192?...

- m f a :1 a t n i ll M a t. is l t ll. hat n its :9

. "ROBERT W. KRUSE, OE INDIANAPOLIS, INDIANA.

AND FEED DOORS.

application filed Aaugllst 16, 1919., Serial No. 817,958.

T all whom it may concern:

Be it known that 1, ROBERT W. Knnsn, a citizen of the United States, and a resident of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Process of Forming Connecting Collars for Radiators and Feed Doors; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts.

This invention relates to a process of forming connecting collars for radiators and feed doors on furnaces and like constructions which may become heated to a high degree. Dihicultyhas been experienced in using the, common construction of riveting a cast iron connecting collar to the walls of the fun nace, because of the different expansions of the two metals under the heat, which will cause slight separation and warping and permit leakage, besides increasing the cost and time of production. The process of forming the connectin collars, as will be hereinafter more speci cally shown and described, will permit of its complete formation from the same metal as the walls are composed of, whereby the complete construction can be formed from a simple stamping and welding process at the minimum of cost. One of the advantages of this construction is that the bolts for securing the connection are placed away from the furnace wall, whereby they will not be exposed to the heat asin the ordinary construction where the connections are bolted directly into or adj acent the Wall. 7

Referring to the drawings, which are made a part of this application, Fig. 1 is a perspective view showing the completely formed connecting collar. Fig. 2 shows a portion of the: metal used in the walls of the furnace after it has been cut. Fig. 3 is a sectiontaken on the line 3-3 of Fig. 2 showing the side walls of the collar bent outwardly. Fig.

4. is a front elevation showing the same formation as in Fig. 3. Fig. 5 is a plan View looking down upon a section of the metal forming the top and bottom of the collar. Fig. 6 is a front elevation of the same as shown in Fig. 5. Fig. 7 shows asection of a furnace with the top section in place. Fig. 8 is a front elevation showing a furnace with the completed. collar formed thereon. Fig. 9 is a side elevation of the same as shown in Fig. 8. i

The process of forming the connecting collar from the same sheet of metal as is used in forming the walls of the furnace,

consists in taking the blank sheet 10 and cutting therein a downwardly extending slot 11 from the top thereof, and a cross slot 12 at right angles to the slot 11 and connecting with the bottomthereof, and the bolt holes 13 on each side of the vertical slot 11. The portions 14 of the metal 10 are then bent outwardly and perpendicular to the body portion so as to be substantially parallel and then bent nearly at right angles to form the flanges 15, substantially parallelto the body portion and at right angles to the parallel portions it. This operation completes the formationof the side sections of the completed connecting collar. 7 i

The top and bottom sections 16 are formed from similar sheet metal. Each section 16 is stamped out and theholes 1? formed therein, and then the flange 18 is turned at right angles thereto as shown in Fig. 5. The sheet metal 10 is then formed into a furnace, usually circular in cross section, and the sections 16 mounted on the top andbottom of the side portions 14 and welded thereon or otherwise suitably secured by creasing, crimping or the like, whereby the completed collar is formed as shown in Figs. 1, '2', 8'

and 9. This simple process enables such a collar to be formed so as to eliminate any riveting, or the mounting of collars formed of other metals, whereby any shrinkage =or warping may occur from the high temperature of the furnace. Aside-from this a much neater and cleaner appearance is given to the job, and an appreciable amount of labor is saved.

The collar flanges l5 and 18 thus formed are positioned in a relatively cool portion of v the furnace construction and to the same may be secured the usual door plate and furnace door, which ordinarily 15 of a different material than sheet metal, or which has a different co-efiicient of expansion. Thus by positioning the securing flanges 15 and 18 away from. the greatest heat of the furnace, the door plate and furnace door may be secured in the doorway and to the flanges where the temperature thereof will not cmphasize the difierenoe in the expansion coefiicient and the leakage usually resulting therefrom.

The invention claimed is:

- The process of making doorway collars'on furnaces having a sheet metal body portion, consisting of cutting the sheet metal vertically with the Wall substantially the samelength as the Width of the collar, cutting said metal perpendicularly to said beforememtioned cut bending the out portion of said metal outwardly away from said Wall so as to form projecting and parallel side portions of said collar, bending the edges of said portions at right angles so as to form connecting flanges, stamping top and bottom sections, and bending a portion thereof outwardly toform corresponding flanges and securing said top and bottom sections to said Y ROBERT W. KRUsE. 

